2020 Fiscal Year Final Research Report
Comparison of neural representations between synesthetic and physical colors in grapheme-color synesthesia
Project/Area Number |
19K23362
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Research Category |
Grant-in-Aid for Research Activity Start-up
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Allocation Type | Multi-year Fund |
Review Section |
0110:Psychology and related fields
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Research Institution | Kwansei Gakuin University (2020) Kyoto University (2019) |
Principal Investigator |
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Project Period (FY) |
2019-08-30 – 2021-03-31
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Keywords | 色字共感覚 / 共感覚色 / 物理色 |
Outline of Final Research Achievements |
Grapheme-color synesthesia is a condition in which visual perception of letters induces simultaneous perception of a specific color. Synesthetic colors are found to be concentrated in multiple regions of the color space, forming “synesthetic color clusters”(Hamada, Yamamoto, & Saiki, 2016). The present study investigated whether color sensitivity corresponding to synesthetic color clusters (clustered colors) is higher than color sensitivity that does not correspond to synesthetic color clusters (non-clustered colors). We also investigated whether the color sensitivity is dependent on the synesthetic experience (associators and projectors). We found that the greater the tendency toward associator characteristics, the greater the sensitivity for clustered colors compared to that for non-clustered colors. Our findings suggest an association between synesthetic colors and physical color sensitivity that is modulated by synesthetic experience.
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Free Research Field |
認知心理学
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Academic Significance and Societal Importance of the Research Achievements |
本研究の学術的意義は、共感覚色の規定因の検討に際して知覚特性に着目した点にある。共感覚色の決定に関するほとんどの先行研究は文字要因からアプローチしている。例えば、文字の形態や音韻の類似性が共感覚色の類似性に影響することが示されている。しかし、文字要因からの検討だけでは共感覚色の決定のメカニズムを説明することは困難である。本研究では、共感覚色と物理色感度に対応関係があることを明らかにした。この結果は、物理色感度が共感覚色になる色とならない色の選択・決定を調整する可能性を示す。
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